论文标题
巨大的声子阻力在轻掺杂钻石中增强了热电器
Colossal phonon drag enhanced thermopower in lightly doped diamond
论文作者
论文摘要
钻石是研究最多的材料之一，因为它具有出色的电气，机械，热和光学特性的独特组合。使用完全自以为是的耦合电子传输理论，我们揭示了另一种引人注目的行为：巨大的阻力增强了轻掺杂的钻石的热电器。在100 K处发现了每kelvin约100,000微伏的热电图值，在相关金属FESB2中显着超过了先前测量的值，并且在高度更高的温度下发生。钻石中的巨大热电器主要是由于周围和低于100 K以下的异常弱的非谐声声子衰减而产生，从而促进了通过电子播音机相互作用在电荷载体和声子之间有效的动量交换。还确定了极大的热电功率因子。这项工作使您可以深入了解固体中耦合电子波系统的物理，并促进了我们对强阻力状态中热电传输的理解。
Diamond is one of the most studied materials because of its unique combination of remarkable electrical, mechanical, thermal and optical properties. Using a fully self-consistent ab initio theory of coupled electron-phonon transport, we reveal another striking behavior: a huge drag enhancement of the thermopower of lightly doped diamond. Thermopower values of around 100,000 microvolts per Kelvin are found at 100 K, significantly exceeding the highest previously measured value in the correlated metal FeSb2, and occurring at much higher temperatures. The enormous thermopower in diamond arises primarily from exceptionally weak anharmonic phonon decay around and below 100 K that facilitates efficient momentum exchange between charge carriers and phonons through electron-phonon interactions. Exceedingly large thermoelectric power factors are also identified. This work gives insights into the physics of the coupled electron-phonon system in solids and advances our understanding of thermoelectric transport in the regime of strong drag.
